Talking about fifth base when there's really only four bases reminds me of the expression Up To Eleven.
If you want to downvote me for using Urban Dictionary, that's fine. First base When you get to first base, you have been lucky enough to have been kissed.
Some people only consider French kissing as getting to first base.
Second base is direct physical contact, usually meaning his hands to her breast.
Just like you did when you were a little kid, and you’d bust out a flashlight under the covers and open a book.If you have never had a boyfriend/girlfriend before, then, of course, the “bases” is just a myth that’s been floating around school. I’m not sure why we use baseball metaphors for sex but we do.Basically, they’re the levels of sexual intimacy you’ve experienced with your partner.Just for the record, I don’t know if I’ve ever been completely taught what the “bases” are, but let’s give it a shot. So you know how in baseball, before you steal a base, you take a good solid lead-off?Figure if anything, we can sort it out together as we move along. Now depending on how far into this we get, I think this is like kissing. Not that I’m saying you’re going to rape the girl at 3rd base, but, this is just more like an intermediary bridge between second and third.